Navigating anxious attachment

Hey guys I need advise as I feel I am going to go crazy! So I (25m) and my girlfriend (26f) have been poly for about 3 years, as of now we mostly explored the sexual side of poly as we had a bad break up from our first emotional experience that hurt us a lot. Recently we both met this couple Alyssa (22f) and max (23m),using fake names for their privacy) and we really clicked. We chatted for a month went on a few dates and finally had sex and it was unbelievable, all 4 of us really opened up and bonded intimately with each other. They are currently on holiday in another counter for a month. They communicated that they won't won't has chatty for this month and that if we need reassurance we must please ask as they want this to be long term. This is where I need advice, I am autistic and struggle with anxious attachment. They have still been chatting throughout the day while on holiday but the replies feel off and different a part of me knows this is just because their energy is with their relationship on their holiday but I still get worried and anxious they will ghost or end things. Is a week into their trip too soon to ask for reassurance? How can I navigate this as I feel being to anxious and needy might push them away and ruin things as is. I just need advice because I'm new to the emotional side of poly

Thank you for making it all the way through my post